PNG ICO ICNS MORE
UI
Pixel
Fugue Icons
Wand, exclamation
DarkGoldenrod
16x16
exclamation, Wrench
DarkSlateGray
Desktop apps
Smooth
One bit
exclamation, Alert, notice
48x48
Mixed
August
exclamation, Badge
DodgerBlue
32x32
Diagona Icons
Attention, Alert, exclamation
Splashyfish
Error, Attention, exclamation
Red
3D
Flavour Extended
exclamation, Key
WhiteSmoke
Shopping & e-commerce
Woothemes Ultimate Icon Set
exclamation, stop, Hand
Black
128x128
Led Icons
exclamation
SteelBlue
exclamation, octagon, fram
SandyBrown
PNG MORE
Twotiny
Alert, File, exclamation
Lavender
14x18
notification, Alert, warning
SaddleBrown
4x15
Network & communications
Oxygen
exclamation, Alert, Information
Signs & symbols
34aL volume 3.2 SE
Message, exclamation, warning
Tomato
24x24
Circular
Alert, exclamation, warning
Gold
Function icons
exclamation, warn, warning
triangle, sign, Caution
DRF
Address, exclamation, Book
Peru
judge, auction, exclamation
Maroon
Balloon, exclamation
balloons, exclamation
exclamation, bandaid
exclamation, Bank